code: def on_draw(self, ev):
      gloo.clear(color="black", depth=True)
      self.image.draw()
  
file_path: vispy/examples/basics/visuals/image_visual.py
imports: import numpy
  import vispy.app
  from vispy import gloo
  from vispy import visuals
  from vispy.visuals.transforms import STTransform
label_desc: Use image node_id 2 for calling the Canvas obj's underlying member method code with example usage: obj.on_draw(ev) without return types